Nervous System: Senses

Question 1

What is acetylcholine?

Answer 1

A type of NEUROTRANSMITTER in the somatic nervous system that TRIGGERS the firing of MOTOR NEURONES.

Question 2

What is aqueous humour?

Answer 2

The clear fluid inside the FRONT part of the eye. It NOURISHES the eye and keeps it INFLATED.

Question 3

What is astigmatism?

Answer 3

An imperfection in the curvature of the eye where the CORNEA or the LENS has mismatched curves that causes blurred distance and near vision.
The surface is EGG-shaped.

Question 4

Define (Cochlear)Auditory Nerve.

Answer 4

Behind the cochlea, the auditory nerve is responsible for sending sound vibrations(signals) to the brain.

Question 5

The part of the nervous system that controls bodily functions that are not consciously directed such as breathing and digestion is known as?
(Not on senses quiz)

Answer 5

The autonomic nervous system.

Question 6

Basilar membrane:

Answer 6

The MAIN mechanical structure of the inner ear. It presents the FIRST LEVEL of FREQUENCY ANALYSIS in the COCHLEA because of its changing stiffness.

Question 7

Blind spot in the eye:

Answer 7

Where the OPTIC NERVE passes through the retina, there are NO photoreceptors there to detect light, thus causing a small blind spot.

Question 8

Cataracts?

Answer 8

Cataracts are common as you get older. They are a CLOUDY area in the LENS of your eye.

Question 9

What part of the ear is a hollow, spiral shaped bone filled with fluid that plays a key role in the sense of hearing?

Answer 9

The cochlea.

Question 10

What are the four structures found in the middle ear? (In order)

Answer 10

THE OSSICLES
1) Malleus (hammer)
2) Incus anvil
3) Stirrup stapes
4) Oval window

Question 11

Main structures in a neuron:

Answer 11

1) Cell body
2) Axon
3) Dendrites

Question 12

What does the cell body consist of?

Answer 12

It consists of the nucleus and cytoplasm.

Question 13

What is the nucleus in a neuron?

Answer 13

A membrane bound structure found in the SOMA. It contains the nucleolus and chromosomes, necessary for coded PRODUCTION of PROTEINS.

Question 14

What is the central nervous system responsible for?

Answer 14

The central nervous system is made up of the BRAIN and SPINAL chord. Its 3 main functions are to take in SENSORY information, PROCESS information and SEND OUT MOTOR signals.

Question 15

Cerebellum Function:

Answer 15

Important or making postural adjustments in order to maintain BALANCE.
As well as COORDINATION, MOVEMENT and MOTOR SKILLS.

Question 16

Cerebral hemisphere:

Answer 16

One HALF of the brain, the part that controls MUSCLE functions, SPEECH, THOUGHT, EMOTIONS, READING, WRITING AND LEARNING.

Question 17

What is the cerebrum?

Answer 17

The LARGEST part of the brain which is divided into two hemispheres.

Question 18

Cholinesterase

Answer 18

Rapid enzyme breaking down neurotransmitter acetylcholine.

Question 19

Choroid Layer?

Answer 19

A thin layer of tissue BETWEEN the SCLERA and RETINA.
Filled with BLOOD VESSELS that bring oxygen and nutrients to the eye.

Question 20

Cochlea:

Answer 20

Hollow spiral shaped bone found in inner ear that SENDS signals to the brain.

Question 21

CONES!

Answer 21

Photoreceptor cells responsible for COLOUR VISION as well as COLOUR SENSITIVITY.
In LOWER retina.

Question 22

ROD cells:

Answer 22

Photoreceptor cells in the retina. Sensitive to light levels and give us good vision in LOW LIGHT.
In OUTER retina.

Question 23

What is the neuromuscular junction?

Answer 23

A SYNAPTIC CONNECTION b/w the terminal end of a motor neuron and a muscle.

Question 24

Define norepinephrine.

Answer 24

A neurotransmitter and a hormone. It is used to increase and MAINTAIN BLOOD PRESSURE in limited, short-term serious health situations.

Question 25

What is the function of the Medulla Oblongata?