BIOG 121 Spring 2018 Midterm Extra Credit Name Directions: Circle the correct an
ID: 3513094 • Letter: B
Question
BIOG 121 Spring 2018 Midterm Extra Credit Name Directions: Circle the correct answer for each question. Points possible: 5 (Ipt/question) 1. The main components of the skin are the: (A) epidermis and dermis. B) dermis and hypodermis. C) epidermis, dermis, and hypodermis. D) epidermis, dermis, hypodermis, and the subcutaneous layer. 2. Which statement best describes epithelial tissue? A) Simple epithelia are commonly found in areas of high mechanical abrasion. B) Paracellular or transcellular transport moves substances across simple epithelia. C) Pseudostratified epithelia are commonly keratinized. D) Stratified epithelia are associated with diffusion, osmosis, and filtration. 3. Which of the following reactions requires energy, such as ATP, to proceed? A) phosphorylation reactions B) oxidation reactions C) exergonic reactions D) endergonic reactions 4. A substance moves by facilitated diffusion into a cell. What is required for its transport? A) neither ATP nor a protein channel B) ATP C) ATP and a protein channel D) protein channel 5. The cuticle around a nail is the: A) eponychium. B) hyponychium. C) perinychium. D) lunula.Explanation / Answer
1. The main components of the skin are the:
(A) epidermis and dermis. B) dermis and hypodermis. C) epidermis, dermis, and hypodermis. D) epidermis, dermis, hypodermis, and the subcutaneous layer.
Answer is A as both of these are MAIN components of skin.
2. Which statement best describes epithelial tissue? A) Simple epithelia are commonly found in areas of high mechanical abrasion. B) Paracellular or transcellular transport moves substances across simple epithelia. C) Pseudostratified epithelia are commonly keratinized. D) Stratified epithelia are associated with diffusion, osmosis, and filtration.
B) Paracellular or transcellular transport moves substances across simple epithelia. This is the answer.
3. Which of the following reactions requires energy, such as ATP, to proceed? A) phosphorylation reactions B) oxidation reactions C) exergonic reactions D) endergonic reactions
Endergonic reactions are the reactions which require energy to be driven.
4. A substance moves by facilitated diffusion into a cell. What is required for its transport? A) neither ATP nor a protein channel B) ATP C) ATP and a protein channel D) protein channel
Answer is protein channel. As we all know that only carrier protein or channel proteins are required for facilitated diffusion.
5. The cuticle around a nail is the: A) eponychium. B) hyponychium. C) perinychium. D) lunula.
The answer will be perinychium. This is the other name for cuticel.
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