(a) Why are nerve cells long and have branches ? (b) What is the other name of a nerve cell ?
The human body contains a large number of cells A which are very long and branched, and look like electric wires. The longest branch of this cell is B whereas there are many small branches C. Any two A cells do not join to one another completely in the human body. There is a microscopic gap D between every pair of adjacent A cells through which electric impulses can pass by the release of a chemical substance.
(a) What are cells A ?
(b) What is the name of (i) branch B, and (ii) branches C ?
(c) What is the microscopic gap D is known as ?
(d) What is the function of cells like A in the human body ?
(e) The cells A are of three types. Name the three types.
A long and branched animal cell is :
Question 24 The table given below has certain terms and four blank spaces named A, B, C, and D From the options given below choose the correct combination of terms. (a) A-Pseudopodia; B-Respirations; C-Muscle cell; D-Branched (b) A-Pseudopodia; B-Photosynthesis; C-Muscle cell; D-Branched (c) A-Contractile vacuole; B-Photosynthesis; C-Blood cell; D-Spindle shaped (d) A-Pseudopodia; B-Photosynthesis; C-Cheek cell; D-Spindle shaped
Mukesh was looking for a slide of a nerve cells among five unlabelled slides. Which of the following will help him identify the nerve cells?
a) Spindle shaped cells with big central nucleus
b) Red coloured, biconcave disc shaped enucleated cells
c) A cell body with branched extensions at one end and a long projection at the other
d) Round or oval cells with a bilobed nucleus