Answer:
The correct answer will be option-C
Explanation:
The rhythm of the heartbeat is controlled by the pacemaker of the heart called the sino-atrial node.
The SA node generates action potentials which trigger the contraction and relaxation of the atrium and ventricles. The membrane potential generation initiates by the depolarization of the cell membrane when the L type of Ca⁺² ions opens up and calcium ions enter the cell.
This depolarizes the cell until the potential threshold is reached which lies between the -40 and -30 mV.
Thus, Option-C is the correct answer.
Adrenaline, Cortisol, Norepinephrine.
In the development of a cancer cell, the formation of new blood vessels is called Angiogenesis, option B. When tumors are present in the body, circulation and the distribution of nutrients in the body is altered; thus, resulting in different kinds of disorders associated with cancer. With the presence of cancer, these tumors need more nutrients to spread and grow, which results in the formation of more blood vessels.
Answer:
The correct answer is - option C.
Explanation:
Iridotomy is a procedure which is used to treat condition like narrow angle glaucoma and chronic open angle glaucoma, angle closure glaucoma and other chronic glaucoma conditions. In many cases iridotomy is needed to be performed immediately.
Iridotomy procedure in this case is helpful as it is improve the outflow of the drainage which is causing the intraocular pressure which is 50 mm in this case and also will help in reducing the pain.
Thus, the correct answer is - option C.
D. the 4 types of tissues in the body are: muscle, nerve, connective and epithelial
