Neurone Study guides, Study notes & Summaries

Describe the events of fertilisation that occur after the acrosome reaction. -Membrane of sperm and egg cell fuse together -cortical granules release contents into zona pellucida -Zona pellucida thickens -Haploid nuclei fuse Explain how phospholipids form a cell surface membrane -Hydrophilic parts associate with water -Hydrophobic parts repel water -a bilayer forms with hydrophobic parts pointing in towards the centre of the bilayer Describe the role of the CFTR protein in e...

AQA A-level BIOLOGY 7402/3 Paper 3 Mark scheme June 2023. (There are) stretch-mediated sodium ion channels (in the membrane); 2. (Increased pressure) deforms/changes (sensory neurone/axon) membrane/lamella(e) OR (Increased pressure) deforms/changes sodium ion channels; 3. Sodium ion channels open; 4. Sodium ions diffuse in; 5. Depolarisation (leading to generator potential); 3 max (3 x AO1) 1. 2. 3. or 4. Accept Na+ Max 2 if only reference to sodium and not sodium ions 4. Accep...

AQA A Level Biology - Topic 6 - Survival And Response What is a stimulus? A change in the environment of an organism What is a tactic response? What is a kinetic response? Directional movement in response to a stimulus Non directional random movement in response to a stimulus What is a positive and negative taxis? Positive taxis- organism moves towards stimulus Negative taxis - organism moves away from stimulus What Are receptors? different types What are effec...

1. Question: Which type of contraction allows a muscle to produce tension without changing the angle of a skeleton joint all moving a load? 2. Question: Mooth muscle tissue can be found in all but which of the following places? 3. Question: All but which of the following are characteristics of aerobic respiration? 4. Question: Which structures of cardiac muscle allows the cells to contract in waves so the heart can both as a pump? 5. Question: Slow oxidative (SO) muscle fibres: 6. Question:...

negative tropisms - Answer-growth away from a stimulus Define homeostasis - Answer-Homeostasis is the regulation of internal conditions in the body. It is necessary to maintain optimal conditions for body functioning. These internal conditions can change as a result of processes within the body and as external conditions change. systems responsible for homeostasis - Answer-the nervous system - uses electrical impulses to communicate the endocrine system - uses chemical molecules to commun...

1. Question: Which type of contraction allows a muscle to produce tension without changing the angle of a skeleton joint all moving a load? 2. Question: Mooth muscle tissue can be found in all but which of the following places? 3. Question: All but which of the following are characteristics of aerobic respiration? 4. Question: Which structures of cardiac muscle allows the cells to contract in waves so the heart can both as a pump? 5. Question: Slow oxidative (SO) muscle fibres: 6. Question:...

BTEC Applied Science Unit 1 Biology Exam 118 Questions with Answers Describe the function of the nucleolus - CORRECT ANSWER Produces ribosomes and RNA Describe the function of the cell wall - CORRECT ANSWER Provides rigidity and protection to the cell Describe the function of the chloroplasts - CORRECT ANSWER Site of photosynthesis as they contain chlorophyll Describe the function of the plasmodesmata - CORRECT ANSWER A channel through the cell wall the allows transport of materials ...

1. Question: Which type of contraction allows a muscle to produce tension without changing the angle of a skeleton joint all moving a load? 2. Question: Mooth muscle tissue can be found in all but which of the following places? 3. Question: All but which of the following are characteristics of aerobic respiration? 4. Question: Which structures of cardiac muscle allows the cells to contract in waves so the heart can both as a pump? 5. Question: Slow oxidative (SO) muscle fibres: 6. Question:...

1. Question: Which type of contraction allows a muscle to produce tension without changing the angle of a skeleton joint all moving a load? 2. Question: Mooth muscle tissue can be found in all but which of the following places? 3. Question: All but which of the following are characteristics of aerobic respiration? 4. Question: Which structures of cardiac muscle allows the cells to contract in waves so the heart can both as a pump? 5. Question: Slow oxidative (SO) muscle fibres: 6. Question:...