Name the parts labelled A, B and C in the diagram of the cross section of the spinal cord - Leaving Cert Biology - Question 14(b) - 2015
Question 14(b)
Name the parts labelled A, B and C in the diagram of the cross section of the spinal cord.
What is the main structural difference between A and B?
1. What is the f... show full transcript
Worked Solution & Example Answer:Name the parts labelled A, B and C in the diagram of the cross section of the spinal cord - Leaving Cert Biology - Question 14(b) - 2015
Step 1
Name the parts labelled A, B and C in the diagram of the cross section of the spinal cord.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A = grey matter
B = white matter
C = central canal or cerebrospinal fluid (CSF)
Step 2
What is the main structural difference between A and B?
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Part A consists mainly of cell bodies or mostly no myelin, while part B consists mainly of axons or mostly myelin.
Step 3
What is the function of the meninges?
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The function of the meninges is to provide protection for the central nervous system (CNS).
Step 4
How many layers are present in the meninges?
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
There are three layers present in the meninges.
Step 5
What is a reflex action?
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
A reflex action is an automatic (or involuntary) response to a stimulus.
Step 6
Outline the mechanism of a reflex action.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The mechanism involves stimulation at the receptor, which causes an impulse along the sensory neuron. This impulse travels through the interneuron and then through the motor neuron to the effector (muscle or gland), which reacts. Additionally, another impulse is sent back to the brain.
Join the Leaving Cert students using SimpleStudy...
