Answer: D. Seminiferous tubules → Epididymis → Vas deferens → Ejaculatory duct → Urethra
Explanation:
In humans<u> sperms are produced</u> in the seminiferous tubules of the testis; and stored momentarily in the epididymis . They swim through the (paired )Vas deferens to the single ejaculatory duct, to exist through the urethra that runs the penis length. The urethra is also the passage for urine.
Answer:
The binding of ACh to the muscarinic receptor indirectly affects the permeability of K⁺channels. This can produce hyper polarization in some organs if channels are opened, and depolarization in others if channels are closed.
Explanation:
For example, in the heart it is the beta-gamma compound that fixes to the K+ channels of heart muscle and sources them to exposed. This leads to K+ dispersion out of the cell and the cell converts into hyper polarized consequential in a reduction in heart rate. In contrast, in smooth muscle of the stomach the alpha sub unit fixes to K+ channels producing them to close. This decreases the external diffusion of K+ and the cell converts depolarized ensuing in smooth muscle contraction.
Maybe D but at the same time it could be A
C. In anaerobic exercise muscles do not use oxygen. In aerobic exercise muscle use oxygen.
The answer to your question is digestive.
