biology Flashcards

1
Q

What is the primary function of the nervous system?

A

To control and coordinate body activities by transmitting signals between different parts of the body.

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2
Q

True or False: The endocrine system uses hormones to communicate and regulate bodily functions.

A

True

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3
Q

Fill in the blank: The _____ is the basic unit of the nervous system.

A

neuron

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4
Q

What are the two main parts of the nervous system?

A

Central nervous system (CNS) and peripheral nervous system (PNS).

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5
Q

Short answer: What is the role of sensory neurons?

A

To transmit sensory information from receptors to the central nervous system.

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6
Q

Multiple choice: Which part of the brain is responsible for coordination and balance?

A

Cerebellum

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7
Q

What is a reflex action?

A

An automatic, rapid response to a stimulus that does not involve conscious thought.

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8
Q

True or False: Hormones are produced by glands in the endocrine system.

A

True

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9
Q

Fill in the blank: The _____ carries signals away from the neuron.

A

axon

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10
Q

What is homeostasis?

A

The process by which organisms maintain a stable internal environment.

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11
Q

Short answer: Name one function of the hypothalamus.

A

To regulate body temperature and maintain homeostasis.

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12
Q

Multiple choice: Which hormone is primarily responsible for the fight-or-flight response?

A

Adrenaline

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13
Q

What is the function of the myelin sheath?

A

To insulate axons and increase the speed of nerve impulse transmission.

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14
Q

True or False: The spinal cord is part of the peripheral nervous system.

A

False

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15
Q

Fill in the blank: The _____ connects the brain to the rest of the body.

A

spinal cord

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16
Q

Short answer: What is the role of motor neurons?

A

To transmit signals from the central nervous system to muscles and glands.

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17
Q

Multiple choice: Which gland is known as the ‘master gland’?

A

Pituitary gland

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18
Q

What is the role of neurotransmitters?

A

To transmit signals across synapses between neurons.

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19
Q

True or False: The autonomic nervous system controls voluntary movements.

A

False

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20
Q

Fill in the blank: The _____ is responsible for processing visual information.

A

occipital lobe

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21
Q

Short answer: What is the function of the adrenal glands?

A

To produce hormones that help regulate metabolism, immune response, and stress.

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22
Q

Multiple choice: Which part of the brain controls breathing and heart rate?

A

Medulla oblongata

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23
Q

What is the function of the limbic system?

A

To regulate emotions, memory, and motivation.

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24
Q

True or False: Insulin is a hormone that lowers blood glucose levels.

A

True

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25
Fill in the blank: The _____ coordinates voluntary movements and balance.
cerebellum
26
Short answer: What is the primary role of the thyroid gland?
To regulate metabolism and growth through hormone secretion.
27
Multiple choice: Which type of neuron connects sensory and motor neurons?
Interneuron
28
What is the purpose of feedback mechanisms in the endocrine system?
To maintain homeostasis by regulating hormone levels.
29
True or False: The somatic nervous system controls involuntary actions.
False
30
Fill in the blank: The _____ is the part of the neuron that receives signals.
dendrite
31
Short answer: What is the difference between the sympathetic and parasympathetic nervous systems?
The sympathetic nervous system prepares the body for stressful situations, while the parasympathetic nervous system promotes rest and relaxation.
32
What is the primary function of the brain?
To process information and coordinate bodily functions.
33
True or False: Neurons are the basic building blocks of the brain.
True
34
Fill in the blank: The brain is divided into _____ main parts.
three
35
What are the three main parts of the brain?
Cerebrum, Cerebellum, Brainstem
36
What is the role of neurotransmitters?
To transmit signals across synapses between neurons.
37
Multiple Choice: Which part of the brain is responsible for balance and coordination? A) Cerebrum B) Cerebellum C) Brainstem
B) Cerebellum
38
What is a receptor in the context of the nervous system?
A protein molecule that receives chemical signals from outside a cell.
39
True or False: Receptors can only bind to one specific type of neurotransmitter.
True
40
Fill in the blank: The _____ lobe is primarily responsible for processing visual information.
occipital
41
What is the function of the frontal lobe?
Involved in reasoning, planning, movement, and problem-solving.
42
Multiple Choice: Which of the following is NOT a type of neuron? A) Sensory neuron B) Motor neuron C) Hormonal neuron
C) Hormonal neuron
43
What is the role of glial cells?
To support and protect neurons.
44
True or False: The blood-brain barrier allows all substances to enter the brain freely.
False
45
Fill in the blank: The _____ system is involved in emotional responses.
limbic
46
What is synaptic plasticity?
The ability of synapses to strengthen or weaken over time, in response to increases or decreases in activity.
47
Multiple Choice: Which neurotransmitter is primarily associated with mood regulation? A) Dopamine B) Serotonin C) Acetylcholine
B) Serotonin
48
What does the term 'action potential' refer to?
A rapid rise and fall in voltage across a cellular membrane.
49
True or False: Myelin sheaths increase the speed of neural transmission.
True
50
Fill in the blank: The _____ is the part of the brain responsible for regulating autonomic functions such as heart rate and breathing.
brainstem
51
What is the primary function of the temporal lobe?
Involved in processing auditory information and memory.
52
Multiple Choice: Which part of the brain is involved in higher cognitive functions such as thinking and decision-making? A) Cerebellum B) Brainstem C) Cerebrum
C) Cerebrum
53
What is the function of the parietal lobe?
Processes sensory information such as touch, temperature, and pain.
54
True or False: The thalamus acts as a relay station for sensory information.
True
55
Fill in the blank: The _____ is a part of the limbic system that is crucial for memory formation.
hippocampus
56
What are the two main types of receptors in the nervous system?
Ionotropic and Metabotropic receptors.
57
Multiple Choice: Which neurotransmitter is primarily involved in muscle contraction? A) GABA B) Glutamate C) Acetylcholine
C) Acetylcholine
58
What is the role of the hypothalamus?
To regulate homeostasis and control the endocrine system.
59
True or False: The corpus callosum connects the left and right hemispheres of the brain.
True
60
Fill in the blank: The _____ is involved in emotional regulation and is part of the limbic system.
amygdala
61
What is the primary role of the occipital lobe?
To process visual information from the eyes.
62
Multiple Choice: Which type of receptor is activated by the binding of a neurotransmitter that leads to direct changes in ion flow? A) Ionotropic B) Metabotropic C) Both
A) Ionotropic
63
What is homeostasis?
The maintenance of stable internal conditions in an organism.
64
True or False: The peripheral nervous system includes the brain and spinal cord.
False
65
Fill in the blank: The _____ is responsible for the body's fight or flight response.
sympathetic nervous system
66
What is the role of the parasympathetic nervous system?
To promote rest and digest functions in the body.
67
Multiple Choice: Which part of the neuron receives signals from other neurons? A) Axon B) Dendrites C) Soma
B) Dendrites
68
What is the function of neurotransmitter reuptake?
To clear neurotransmitters from the synaptic cleft and terminate the signal.
69
True or False: All neurons are capable of generating action potentials.
False
70
Fill in the blank: The _____ is a fatty layer that insulates the axon of a neuron.
myelin sheath
71
What is a synapse?
The junction between two neurons where communication occurs.
72
Multiple Choice: Which neurotransmitter is involved in the reward pathway of the brain? A) Norepinephrine B) Dopamine C) Serotonin
B) Dopamine
73
What is the role of the cerebellum?
To coordinate voluntary movements and maintain posture.
74
True or False: The brain's left hemisphere is primarily responsible for language processing in most people.
True
75
Fill in the blank: The _____ is the outer layer of the brain that is involved in higher-level processing.
cerebral cortex
76
What is the primary function of the brainstem?
To control basic life functions such as breathing and heart rate.
77
Multiple Choice: Which type of glial cell is responsible for myelination in the central nervous system? A) Schwann cells B) Oligodendrocytes C) Astrocytes
B) Oligodendrocytes
78
What is the role of astrocytes?
To support neurons, maintain the blood-brain barrier, and regulate blood flow.
79
True or False: The brain can regenerate neurons throughout a person's life.
False
80
Fill in the blank: The _____ is a structure that connects the two hemispheres of the brain.
corpus callosum
81
What is the function of the thalamus?
To relay sensory information to the appropriate areas of the brain.
82
Multiple Choice: Which neurotransmitter is primarily inhibitory? A) Glutamate B) GABA C) Acetylcholine
B) GABA
83
What is the primary role of the limbic system?
To regulate emotions and memory.
84
True or False: The brain is capable of forming new connections throughout life.
True
85
Fill in the blank: The _____ is the part of the brain that controls voluntary movements.
motor cortex
86
What is the role of the sensory cortex?
To process sensory input from the body.
87
Multiple Choice: Which part of the brain is involved in regulating circadian rhythms? A) Pineal gland B) Pituitary gland C) Hypothalamus
A) Pineal gland
88