Answer: D. Contractility of the heart muscle refers to the force of contraction that this muscle can exert.
Explanation:
The myocardial contractility is ability of the heart muscles to contract. This is achieved by the forces which develop between the contracting muscles caused by the filaments of actin and myosin.
The degree of binding of the muscle filaments dependents upon the calcium ion concentration. These actions are controlled in vivo by the sympathetic nervous system. It is driven by the release of the catecholamine, which is a process which determines the calcium ion concentration inside the cytosol of the muscles of the heart.
Answer: Kaposi's Sarcoma
Explanation:
The Kaposi's sarcoma remains one of the most common cancer in people suffering from HIV. It is caused by the virus known as herpes virus 8.
It is developed when the cells that line the lymph or blood vessels begins to divide without stopping and starts spreading in the adjacent tissues.
It has the ability to start in several parts of the body at once.
Hence the correct answer is" Kaposi's Sarcoma "
Answer:
Waste products excreted by kidney are uric acid, urea, creatinine and salts.
Explanation:
Kidneys are the bean shaped organs involved in the process of excretion. The nephrons are present in the kidney acts as the main filtration unit of the excretory system.
The urine is formed by the kidney including three main process - glomerular filtration, tubular reabsorption and tubular secretion. The urine contains excess ions, phenols and sulfates. Some amount of uric acid and creatinine are excreted by the kidney.
Answer:
Superior Vena Cava -> Right Atrium -> Right Ventricle -> Pulmonary Artery -> Lungs -> Left Atrium -> Left Ventricle -> Aorta -> Rest of Body
The term Emission describes the movement of sperm and accessory gland secretions into the urethra.
What is Emission?
A discharge; referring usually to a discharge of the male internal genital organs into the internal urethra; the contents of the organs, including sperm cells, pro static fluid, and seminal vesicle fluid, mix in the internal urethra with mucus from the bulbourethral glands to form semen.
Movement of sperm:
When ejaculation occurs, sperm is forcefully expelled from the tail of the epididymis into the deferent duct. Sperm then travels through the deferent duct through up the spermatic cord into the pelvic cavity, over the ureter to the prostate behind the bladder.
Learn more about emission:
brainly.com/question/10281152
#SPJ4
