Chapter 2 Retrieval Practice

Question 1

When a neuron fires an action potential, the information travels through the axon, the dendrites, and the cell body, but not in that order. Place these three structures in the correct order.

Answer 1

Dendrites, cell body, then the axon.

Question 2

How does our nervous system allow us to experience the difference between a slap and a tap on the back?

Answer 2

Stronger stimuli (the slap) fire more frequently than a weaker stimuli (the tap)

Question 3

What is the resting potential set at, and what is the level of stimulation required to fire a neural impulse?

Answer 3

-70mV, and the threshold is -55mV, it surpasses and the action potential reaches +40mV

Question 4

What happens at the synaptic gap?

Answer 4

Neuro transmitters cross a tiny gap between ones neurons terminal branch, and the next neurons dendrite or cell body

Question 5

What is reuptake?

Answer 5

Reuptake is the absorption of excess neurotransmitters.

Question 6

Serotonin, dopamine, and endorphins are all chemical messengers called___________?

Answer 6

Neurotransmitters

Question 7

Acetylcholine’s functions are ________, ________,________?

Answer 7

Enabling muscle action, learning, and memory.

Question 8

Endorphins are neurotransmitters that influence the perception of _______, _______?

Answer 8

Pain and pleasure.

Question 9

What do Agonist molecules do?

Answer 9

Help increase neurotransmitter’s action

Question 10

What to Antagonists molecules do?

Answer 10

Block neurotransmitters

Question 11

Curare poisoning paralyzes its victims by blocking ACh receptors involved in muscle movements. Morphine mimics endorphin actions. Which is Agonist, and Antagonist?

Answer 11

Curare poisoning is Antagonist, and morphine is Agonist.

Question 12

What are three main types of neurons?

Answer 12

Sensory neurons, which carry info from the body’s tissues and sensory receptors. Motor neurons, which carry instructions from the CNS to the muscles and glands; and interneurons, which are between the sensory and motor input, where info is processed.

Question 13

What role does the Autonomic nervous system do?

Answer 13

Controls our glands, and internal organs. (Autonomy)

Question 14

Somatic nervous system controls

Answer 14

Sensory input, and motor output (skeletal muscles)

Question 15

Sympathetic nervous system does what?

Answer 15

Arouses, and expands energy

Question 16

Parasympathetic nervous system does what?

Answer 16

Parasympathetic calms the body, and conserves energy

Question 17

Our brains have how many neurons?

Answer 17

86 Billion neurons

Question 18

The Endocrine system is the fast or slow chemical communication system?

Answer 18

endocrine is the slow chemical communication system; it a set of glands that secrete hormones’ into the blood stream.

Question 19

What bodily changes does your Autonomic nervous system direct before and after an important speech?

Answer 19

ANS sympathetic arouses you, then parasympathetic comes into play and calms you.

Question 20

Where are adrenal glands located?

Answer 20

On top of the kidneys.

Question 21

Pituitary is the endocrines _______ gland?

Answer 21

Most influential gland, it regulates growth and controls other endocrine glands.

Question 22

How are nervous, and endocrines alike?

Answer 22

They both are communication systems- the nervous being much faster, and endocrine the slower chemical messenger.