BIOL/BIOCHEM

Question 1

EFFERENT NERVES

Answer 1

lead away from the central nervous system and are also known as motor pathways. These fibers carry signals to the peripheral nervous system in order to initiate an action, usually a muscle contraction or a glandular secretion.

Question 2

AFFERENT NERVES

Answer 2

transmit signals to the brain

Question 3

Sympathetic Nervous System

Answer 3

Is the system that controls fight-or-flight reactions.

The adrenal glands produce hormones that are implicated in the fight-or-flight response.

Question 4

Parasympathetic Nervous System

Answer 4

Is the system that controls rest-or-digest reactions.

Question 5

Axon

Answer 5

transmits electrical signals from the cell body toward the synaptic knobs and is isolated by the myelin sheath, which is made of Schwann cells.

Question 6

Myelin sheath

Answer 6

Wraps around the axons of some neurons. It does not conduct electricity/signals but allows electrical impulses to transmit quickly and efficiently along the nerve cells by insulating the axon.

Question 7

Synaptic knobs

Answer 7

The end parts of neurons that contain vesicles filled with neurotransmitters which are released into the synaptic gap.

Question 8

Dendrites

Answer 8

Receive incoming signals from other neurons. They do this by receiving neurotransmitters across the synaptic gap.

Question 9

Sodium ion Channels

Answer 9

When open, Na+ enters the neuron and begins depolarization.

Question 10

Potassium ion Channels

Answer 10

When open K+ enters the neuron and Na+ gets out beginning repolarization.

Question 11

Resting Potencial (Hyperpolarization)

Answer 11

Channels of Na+ and K+ stays open, K+ gets out and comes in again doing a reuptake being in rest before depolarize.