BIOD 101 Module 5 Exam Questions with
Correct Answers
Which of the following signaling types is used to transmit ligands to their target cells over long d
istances, using the circulatory system as a transport medium?
1. Autocrine signaling
2. Endocrine signaling
3. Direct cell-to-cell signaling
4. Paracrine signaling
5. Synaptic signaling - CORRECT ANSWER -Endocrine signaling.
Explain why a steroid hormone would require a carrier protein to transport it through the blood
stream. - CORRECT ANSWER -
Steroid hormones are hydrophobic. They would require a carrier protein to carry it through the
blood because it is considered hydrophilic.
Each of the following is true regarding cellular receptors except:
1. Receptors in each family are classified by their location in the body.
2. Most receptors are located on the outside of a cell, anchored in the plasma membrane.
, 3. Cell surface receptors contain an extracellular region, intracellular region, and a hydrophobic
region in the plasma membrane.
4. Intracellular receptors are located in the cell's cytoplasm. - CORRECT ANSWER -
Receptors in each family are classified by their location in the body.
List TWO specific examples of cellular ligands. - CORRECT ANSWER -
Hormones, peptides, sugars, and other hydrophobic molecules.
So calcium and female sex hormones would classify as ligands.
Fill in the Blank:
Transduction is the chain of and intracellular that relay signals insid
e of a cell. - CORRECT ANSWER -1. Molecules
2. Enzymes
Which of the following statements is true of GPCRs?
1. They thread through the plasma membrane forming loops.
2. They are transmembrane hormone receptors.
3. A modified loop receives ligands on their intracellular side.
Correct Answers
Which of the following signaling types is used to transmit ligands to their target cells over long d
istances, using the circulatory system as a transport medium?
1. Autocrine signaling
2. Endocrine signaling
3. Direct cell-to-cell signaling
4. Paracrine signaling
5. Synaptic signaling - CORRECT ANSWER -Endocrine signaling.
Explain why a steroid hormone would require a carrier protein to transport it through the blood
stream. - CORRECT ANSWER -
Steroid hormones are hydrophobic. They would require a carrier protein to carry it through the
blood because it is considered hydrophilic.
Each of the following is true regarding cellular receptors except:
1. Receptors in each family are classified by their location in the body.
2. Most receptors are located on the outside of a cell, anchored in the plasma membrane.
, 3. Cell surface receptors contain an extracellular region, intracellular region, and a hydrophobic
region in the plasma membrane.
4. Intracellular receptors are located in the cell's cytoplasm. - CORRECT ANSWER -
Receptors in each family are classified by their location in the body.
List TWO specific examples of cellular ligands. - CORRECT ANSWER -
Hormones, peptides, sugars, and other hydrophobic molecules.
So calcium and female sex hormones would classify as ligands.
Fill in the Blank:
Transduction is the chain of and intracellular that relay signals insid
e of a cell. - CORRECT ANSWER -1. Molecules
2. Enzymes
Which of the following statements is true of GPCRs?
1. They thread through the plasma membrane forming loops.
2. They are transmembrane hormone receptors.
3. A modified loop receives ligands on their intracellular side.
