Answer:
The answer is B: All the muscle cells innervated by a single motor neurorn.
Explanation:
It is called a motor unit, all muscle fibers that are innervated by a motor neuron cell. A motor neuron cell can establish contact with up to 150 muscle fibrils, which when activated causes their simultaneous contraction, therefore, all the muscle fibers of a motor unit contract and relax at the same time.
Answer:
The correct answer is A
Explanation:
There are several respiratory centers, the main ones are in the medulla oblongata, also called spinal bulb, image attachment so you can observe better.
Image Reference:
https://en.wikipedia.org/wiki/Respiratory_center
Answer:
The pathway consists of several stages from formation to ejaculation.
Explanation:
The sperms are produced in seminiferous tubules in testes from where it is transferred and stored in the epididymis. Epididymis connects seminiferous tubule to vas deferens and during ejaculation peristalsis movement occur in smooth muscle of vas deferens which push sperms forward to ejaculatory duct.
From ejaculatory duct it enters in the urethra and finally it get ejaculated from penis due to the movement of muscles in the penis.
Answer: False
Explanation:
The taste buds consists of taste receptors which are also called as gustatory cells. These gustatory cells detect different kinds of tastes in food like sweet, salty, bitter, umami, and sour.
The tongue map is considered as misconception that represents the taste buds specific to a particular type of taste are present on specific regions of the tongue.
But many research findings have found that all areas of the mouth consists of taste buds and these taste buds are sensitive to all kind of tastes and individual taste qualities are not restricted to a single part or region of the tongue. Also the taste buds overlap each other and there is no border between taste buds of detecting different taste stimuli.
