Human Body Unit Post-assessment (Grade 7)

The given answer suggests that the person is equally interested in the human body regardless of the rating scale. They could be highly interested (4), moderately interested (3), slightly interested (2), or not interested at all (1).

The question asks the respondent to rate their knowledge about the human body on a scale of 1 to 4. The answer choices include all the options from 1 to 4, indicating that the respondent can choose any of the options based on their level of knowledge.

A malfunction of the thyroid gland would most likely interfere with metabolism because the thyroid gland produces hormones that regulate the body's metabolic rate. If the thyroid gland is not functioning properly, it can lead to an imbalance in hormone production, resulting in a slower or faster metabolism. This can cause various symptoms such as weight gain or loss, fatigue, and changes in body temperature. Therefore, a malfunction of the thyroid gland would directly affect metabolism.

The figure shows the interaction between pancreatic hormones and levels of glucose in the blood. This suggests that feedback mechanisms are involved in regulating glucose levels. Pancreatic hormones such as insulin and glucagon play a crucial role in maintaining blood glucose homeostasis. Insulin helps lower blood glucose levels by promoting glucose uptake into cells, while glucagon raises blood glucose levels by stimulating the breakdown of glycogen into glucose. This feedback system ensures that blood glucose levels are kept within a narrow range, preventing hyperglycemia or hypoglycemia.

The missing structure in the sequence is "Organ". The sequence starts with the simplest structure, which is the "Cell". Then it progresses to the "Organelle", which is a specialized structure within a cell. The next level of complexity is the "Tissue", followed by the "Organ" which is a group of tissues that work together to perform a specific function. The sequence then continues with the "System of the body", which is a group of organs that work together, and finally, the highest level of complexity is the "Organism".

The correct answer is 10:15 p.m.-9:50 a.m. This time period is the longest among the options given, indicating that most of the digestive action of bile and pancreatic juice occurs during this time. Bile is produced by the liver and stored in the gallbladder, and it helps break down fats in the hamburger. Pancreatic juice, produced by the pancreas, contains enzymes that further break down proteins, carbohydrates, and fats. Given the complexity of the hamburger's composition, it would require a longer time for the digestive action of bile and pancreatic juice to fully break down the food.

An artery is the correct answer because arteries carry oxygenated blood away from the heart and towards the body's tissues. The strong muscular walls of arteries help to create a pulsating effect as blood is pumped through them by the heart. This pulsation can be easily detected by feeling the pulse at various points on the body, such as the wrist or neck. Veins, capillaries, lacteals, and lymph nodes do not have the same strong pulsating effect as arteries, making it more difficult to detect a pulse in these structures.

When the individual consumes foods high in potassium, the potassium concentration in the blood may exceed the normal range. In response to this, the excretory system, specifically the kidneys, will work to restore homeostasis by removing the excess potassium from the blood and excreting it through urine. This helps maintain the proper balance of potassium in the body and prevents any potential adverse effects of high potassium levels, such as disruptions in nerve cell communication.

The student accidentally placing her hand on a tack is the event that triggers a response in her body. In this case, the tack acts as a stimulus, causing the student to quickly pull her hand away. The stimulus is the external factor that elicits a response or reaction in an organism.

The smooth endoplasmic reticulum in cells is responsible for lipid synthesis, detoxification, and calcium storage. The organ in the human body that performs similar functions is the liver, not the artery. The liver is involved in lipid metabolism, detoxification of drugs and toxins, and storage of vitamins and minerals.

The concentration of carbon dioxide in the plasma regulates breathing rate by its effect on the medulla. The medulla is a part of the brainstem that controls involuntary functions, including breathing. When carbon dioxide levels increase in the plasma, it triggers the medulla to increase the rate and depth of breathing in order to eliminate excess carbon dioxide and restore balance.

Structure 8 carries oxygenated blood to the body.