Weeks1-5 Flashcards

0
Q

What does the medulla do?

A

Regulates breathing walking heart beat ect

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1
Q

What are the three interconnected layers of the brain?

A

Brain stem. Central core. Cerebrum.

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2
Q

What does the pons do?

A

Connects the spinal cord with the brain and links parts of the brain to one another.

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3
Q

What is the reticular formation?

A

Alerts the cerebral cortex to incoming sensory signals and is responsible for managing conscious and awakening from sleep.

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4
Q

Define the autonomic nervousness system (ans)

A

The subdivision of the peripheral nervous system controls the bodys involuntary motor functions.

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5
Q

What are the three major classes of neurons?

A

Motor, sensory, interneurons.

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6
Q

List three is the functions of glial cells

A

Hold neurons together. Remove dead or damaged neurons. Facilitate neural transmission.

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7
Q

An action potential is caused by what kind of input?

A

Excitatory inputs

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8
Q

At resting potential is the inside of the neurons lightly more negative or positive in comparison to the out side ?

A

Negative.

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9
Q

What are the two electrically charged atoms that are associated with action potentials?

A

Sodium and potassium.

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10
Q

What is the refractory period ?

A

Period of rest during which a new nerve impulse cannot be activated in a segment of an axon

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11
Q

The relaying of information across the synaptic vapid termed what?

A

Synaptic transmission

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12
Q

What are the two subdivisions of the peripheral nervous system

A

Somatic nervous system and the autonomic nervous system

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13
Q

What does the autonomic nervous system do

A

Controls the body’s involuntary motor responses

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14
Q

Which division of the autonomic nervous system monitors routine operation of the body’s internal functions.

A

Parasympathetic division.

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15
Q

What connects the 2 cerebral hemispheres?

A

Corpus collosum

16
Q

What divided each hemisphere I to four areas?

A

Lateral fissure, central suicus corpus collosum. CHeAK

17
Q

What are the parts of the brain stem?

A

Medulla. Pons. Reticular formation Thalamus. Cerebellum.

18
Q

What makes up the limbic system?

A

The hypothalamus Hippocampus. Amygdala.

19
Q

What are photoreceptors?

A

Receptor cell in the retina that are sensitive to light.

20
Q

What are rods?

A

Photoreceptors concentrated in the periphery of the retina that are most active in din illumination.

21
Q

What are cones

A

Photoreceptors concentrated in the centre if the retina responsible for visual experiences of colour.

22
Q

Explain accommodation.

A

The process by which the ciliary muscles change the thickness of the lens of the eye to permit variable focusing on near and distant objects.

23
Q

Dark adaptation.

A

The gradual improvement of the eyes sensitivity after a shift in illumination from light to near darkness