Answer:
The correct answer would be a small intestine.
The small intestine is the principal organ of digestion as well as absorption.
Events take place in the small intestine:
- Intestinal enzymes such as maltase, lactase, sucrase et cetera digest disaccharides to their respective monosaccharides such as glucose, fructose, galactose.
- Dipeptides are digested to amino acids.
- Intestinal lipases convert di and triglycerides into fatty acids and glycerols.
- Lastly, nucleotide and nucleoside are converted their respective sugars and bases.
- The digested food is then absorbed with the help of diffusion, facilitated diffusion, and active transport.
- The mucosa layer of small intestine consists of finger-like projections called villi and microvilli.
- They increase the surface area of the small intestine and help in absorbing the digested food.
- They then transport the absorbed materials to the bloodstream through capillaries and lymphatic vessels lying close to their surface.
Answer:
d. Preload increases.
Explanation:
Preload is affected by the rate of venous return and the venous blood pressure , which are affected by the volume of circulating blood and venous tone .
The preload is related to ventricular end - diastolic volume ,
The higher end - diastolic volume have a higher preload .
<u>Preload is approximated via echocardiographic measurement end diastolic volume or EDV.
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Preload is increased by exercising , or increase in blood pressure and neuroendocrine excitement .
Answer:
fixation, ammonification, nitrification, and denitrification.
Explanation:
The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into multiple chemical forms as it circulates among atmosphere, terrestrial, and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification. The majority of Earth's atmosphere (78%) is atmosphere nitrogen, making it the largest source of nitrogen. However, atmospheric nitrogen has limited availability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems.
Answer:
fills with blood during arousal and causes an erection.
Explanation:
The corpus spongiosum is a mass of tissue present in the under part of the penis (male sexual structure) that is actively responsible for erection of the penis. The corpus spongiosum, in conjunction with the corpus carvernosa works to maintain erection of the penis in males.
During sexual arousal, the corpus spongiosum, which surrounds the urethra (passage for urine and semen) helps keep the urethra open for semen to be released while the carvernosa becomes filled with blood. This constant flow of blood into the carvernosa makes the penis enlarge and assume an erect position.
