Which of the following is NOT one of the four primary tissue types found in the human body?
Epithelial
Nervous
Connective
Exocrine glandular
Correct Answer : D
Exocrine glandular is not one of the four primary ssue types found in the human body. The four primary ssue types are epithelial, nervous, connective, and muscle.
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Correct Answer is B
Explanation
Transcription is the process by which DNA is copied into RNA. During transcription, the DNA molecule unwinds and RNA polymerase reads the DNA sequence and synthesizes a complementary RNA molecule using the DNA as a template.
Correct Answer is B
Explanation
Ligaments are tough bands of fibrous ssue that connect two bones together in a joint. They provide stability and support to the joint, prevenng excessive movement and helping to maintain proper alignment of the bones.
Correct Answer is A
Explanation
Insulin is a hormone produced by the pancreas that plays a crucial role in regulating the levels of glucose (sugar) in the blood. After a person eats a meal, the levels of glucose in the blood rise, which stimulates the pancreas to release insulin into the bloodstream. Insulin acts on various cells in the body, particularly those in the liver, muscles, and adipose tissue, to promote the uptake, use, and storage of glucose.
Insulin helps to lower the levels of glucose in the blood by increasing the uptake of glucose by cells, stimulating the liver and muscle cells to store glucose in the form of glycogen, and inhibiting the production and release of glucose by the liver. This process is known as glucose homeostasis, and it helps to keep the levels of glucose in the blood within a normal range.
Deficiencies or abnormalities in insulin production or function can lead to a range of metabolic disorders, including type 1 and type 2 diabetes. In type 1 diabetes, the body does not produce enough insulin, while in type 2 diabetes, the body becomes resistant to the effects of insulin, leading to elevated levels of glucose in the blood.
Correct Answer is B
Explanation
- Frontal Plane (Coronal Plane) → Divides the body into front (anterior) and back (posterior) halves. ❌
- Transverse Plane → A horizontal plane that divides the body into upper (superior) and lower (inferior) halves. ✅
- Sagittal Plane → Divides the body into left and right halves. ❌
- Coronal Plane → Another name for the Frontal Plane, which divides the body into front and back. ❌
Correct Answer is C
Explanation
The three major pairs of salivary glands are the parod glands, sublingual glands, and submandibular glands. The parotid glands are located just in front of your ears. The sublingual glands are below either side of your tongue, under the floor of your mouth. The submandibular glands are located below your jaw ¹.
Correct Answer is C
Explanation
Innate immunity is a fundamental aspect of the body's defense mechanism that operates from birth. It offers immediate protection against a wide range of pathogens, such as bacteria, viruses, and fungi, without requiring prior exposure to these invaders.
This defense system is non-specific, meaning it doesn't target a particular pathogen but rather provides a generalized response to various threats. Innate immunity includes physical barriers like the skin and mucous membranes, as well as cellular components such as phagocytes and natural killer cells. These elements work together to detect and neutralize potential threats swiftly, preventing infections from taking hold in the body.
Correct Answer is A
Explanation
The chemical formula for water is H2O. It consists of two hydrogen atoms and one oxygen atom.
Correct Answer is A
Explanation
The data collected by the researcher on the number of cars passing through a busy intersection at different times of the day for a month would be most useful to analyze traffic patterns during rush hour.
Correct Answer is A
Explanation
- Enzymatic reactions follow a Michaelis-Menten curve.
- As substrate concentration increases, the reaction rate initially increases rapidly.
- However, at high substrate concentrations, the enzyme becomes saturated, meaning all active sites are occupied, and adding more substrate does not increase the reaction rate further.
- This leads to a plateau in reaction rate, which is represented by line A.
Analysis of the Other Lines:
- B: Shows a linear decrease, which does not represent enzyme kinetics. ❌
- C: Depicts a constant reaction rate independent of substrate concentration, which is incorrect. ❌
- D: Shows a decreasing reaction rate, which does not align with enzyme behavior. ❌
Correct Answer is C
Explanation
- The number of protons in an atom is equal to its atomic number.
- The periodic table shows that phosphorus (P) has an atomic number of 15.
- This means every phosphorus atom has 15 protons in its nucleus.
Analysis of Other Options:
- A. 30 → This is close to the atomic mass (30.97), but the atomic mass is not the same as the number of protons. ❌
- B. 16 → This is incorrect; sulfur (S) has an atomic number of 16, not phosphorus. ❌
- D. 31 → This is rounded from the atomic mass (30.97), but atomic mass ≠ number of protons. ❌
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