Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

SELAMAT DATANG Kuiz Sains Tambahan Tingkatan 5 Bab 1 Set 1

Penyenggaraan Dan Kesinambungan Hidup (English)

KUIZ INI MENGANDUNGI 10 SOALAN

The functional unit of the kidney responsible for forming urine is the nephron. Which part of the nephron is primarily responsible for the selective reabsorption of glucose and amino acids?

Loop of Henle

Proximal convoluted tubule

Collecting duct

Glomerulus

None

What is the main driving force behind the process of ultrafiltration in the glomerulus?

Osmotic pressure created by proteins in Bowman’s capsule.

High hydrostatic pressure due to the differing diameters of afferent and efferent arterioles.

Active transport of waste products into the nephron.

The diffusion of water down its concentration gradient

None

During hemodialysis, how are waste products like urea removed from the patient's blood?

They are actively transported out of the blood by the dialysis machine.

They are filtered out using a high-pressure system similar to the glomerulus.

They are chemically broken down by enzymes present in the dialysis fluid.

They diffuse from the blood into the dialysis fluid down a concentration gradient.

None

The transmission of a nerve impulse across a synapse involves the conversion of signals. What is the correct sequence of this conversion?

Chemical signal to mechanical signal to electrical signal

Electrical signal to chemical signal to electrical signal

Electrical signal to mechanical signal to electrical signal

Chemical signal to electrical signal to chemical signal

None

The human skeleton is divided into two main parts. Which of the following bones belongs to the axial skeleton?

Scapula

Femur

Sternum

Radius

None

Which of the following is NOT part of the appendicular skeleton?

Pelvic Girdle

Vertebral Column

Clavicle

Humerus

None

Which of the following best describes the cause of Alzheimer's disease as mentioned in the source material?

A genetic disorder affecting the myelin sheath, leading to muscle weakness

A progressive disorder caused by a lack of the neurotransmitter dopamine.

Shrinkage of brain tissue and reduced secretion of the neurotransmitter acetylcholine.

The formation of blood clots in the brain, leading to memory loss.

None

What is the role of neurotransmitters such as acetylcholine and GABA?

To carry the chemical signal across the synapse to the next neuron.

To provide energy for the transmission of nerve impulses.

To create a physical bridge for the impulse to cross the synapse.

To form the myelin sheath around the axon.

None

Which type of neuron is responsible for transmitting nerve impulses from the central nervous system to an effector like a muscle or gland?

Afferent neuron

Efferent neuron

Sensory neuron

Interneuron

None

10.

In the mechanism of blood clotting, what is the immediate role of thrombokinase?

It converts fibrinogen into a mesh of fibrin.

It causes platelets to break down and release their contents

It converts prothrombin into thrombin in the presence of calcium ions.

It directly forms a plug at the site of the wound.

None

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